OK Papa; I see from your example that the idea is to go left to right and

and perform the operations in order, disregarding precedence (which

means do dividing and multiplication before additions).

Here's one solution:

1 / 2 x 5 + 7 x 4 x 6 / 9 + 8 * 3 = 100

That's the 1st one of a total of 212 possible solutions!

The last one is:

9 / 8 x 4 + 2 x 6 x 1 / 3 + 7 * 5 = 100